1. Lub npe ntawm hydroxypropyl methylcellulose yog dab tsi?
——Cov Lus Teb: Hydroxypropyl Methyl Cellulose, Lus Askiv: Hydroxypropyl Methyl Cellulose Abbreviation: HPMC lossis MHPC Alias: Hypromellose; Cellulose Hydroxypropyl Methyl Ether; Hypromellose, Cellulose, 2-hydroxypropylmethyl Cellulose ether. Cellulose hydroxypropyl methyl ether Hyprolose.
2. Dab tsi yog daim ntawv thov tseem ceeb ntawm hydroxypropyl methylcellulose (HPMC)?
—— Lus Teb: HPMC yog dav siv nyob rau hauv cov ntaub ntawv siv, txheej, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, textiles, ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam. HPMC tuaj yeem muab faib ua qib kev tsim kho, qib zaub mov thiab qib tshuaj raws li lub hom phiaj. Tam sim no, feem ntau ntawm cov khoom siv hauv tsev yog qib kev tsim kho. Nyob rau hauv kev tsim kho qib, putty hmoov yog siv ntau npaum li cas, li 90% yog siv rau putty hmoov, thiab tus so yog siv rau cement mortar thiab kua nplaum.
3. Muaj ntau ntau hom hydroxypropyl methylcellulose (HPMC), thiab qhov sib txawv ntawm lawv siv yog dab tsi?
—— Lus Teb: HPMC tuaj yeem muab faib ua hom instant thiab kub-solution hom. Cov khoom lag luam tam sim no tawg sai sai hauv dej txias thiab ploj mus rau hauv dej. Lub sijhawm no, cov kua dej tsis muaj viscosity vim tias HPMC tsuas yog tawg mus rau hauv dej yam tsis muaj kev sib cais tiag tiag. Txog 2 feeb, cov viscosity ntawm cov kua maj mam nce, tsim cov pob tshab viscous colloid. Cov khoom kub yaj, thaum ntsib nrog dej txias, tuaj yeem tawg sai sai hauv dej kub thiab ploj hauv dej kub. Thaum qhov kub thiab txias poob rau qee qhov kub, qhov viscosity yuav maj mam tshwm kom txog thaum nws tsim cov pob tshab viscous colloid. Hom kub-melt tsuas yog siv rau hauv cov hmoov putty thiab mortar. Hauv cov kua nplaum thiab pleev xim, yuav muaj kev sib koom ua ke thiab siv tsis tau. Hom instant muaj ntau yam kev siv. Nws tuaj yeem siv rau hauv cov hmoov putty thiab mortar, nrog rau cov kua nplaum thiab xim, tsis muaj contraindications.
4. Yuav ua li cas xaiv ib qho haum hydroxypropyl methylcellulose (HPMC) rau ntau lub hom phiaj?
—— Lus Teb:: Daim ntawv thov ntawm cov hmoov putty: Cov kev xav tau kuj tsawg, thiab cov viscosity yog 100,000, uas yog txaus. Qhov tseem ceeb yog khaws cov dej kom zoo. Daim ntawv thov ntawm mortar: siab dua, siab viscosity, 150,000 zoo dua. Daim ntawv thov ntawm cov kua nplaum: cov khoom siv tam sim nrog cov viscosity siab yog yuav tsum tau.
5. Dab tsi yuav tsum tau them rau hauv kev siv tiag tiag ntawm kev sib raug zoo ntawm viscosity thiab kub ntawm HPMC?
—— Lus Teb: Lub viscosity ntawm HPMC yog inversely proportional rau qhov kub thiab txias, uas yog hais tias, lub viscosity nce raws li qhov kub thiab txias. Lub viscosity ntawm ib yam khoom peb feem ntau xa mus rau qhov kev xeem ntawm nws 2% aqueous tov ntawm qhov kub ntawm 20 degrees Celsius.
Hauv kev siv tswv yim, nws yuav tsum raug sau tseg tias nyob rau hauv cov cheeb tsam uas muaj qhov sib txawv ntawm qhov kub thiab txias ntawm lub caij ntuj sov thiab lub caij ntuj no, nws raug nquahu kom siv cov viscosity tsawg hauv lub caij ntuj no, uas yog qhov zoo rau kev tsim kho. Txwv tsis pub, thaum kub qis, viscosity ntawm cellulose yuav nce, thiab txhais tes xav tias yuav hnyav thaum khawb.
Nruab nrab viscosity: 75000-100000 feem ntau yog siv rau putty
Yog vim li cas: tuav dej zoo
High viscosity: 150000-200000 Feem ntau yog siv rau polystyrene particle thermal rwb thaiv tsev mortar roj hmab hmoov thiab vitrified microbead thermal rwb thaiv tsev mortar.
Yog vim li cas: Lub viscosity siab, lub mortar tsis yooj yim rau poob, sag, thiab kev tsim kho tau zoo dua qub.
6. HPMC yog non-ionic cellulose ether, yog li dab tsi yog non-ionic?
—— Lus Teb: Nyob rau hauv layman cov ntsiab lus, non-ions yog cov khoom uas tsis ionize hauv dej. Ionization yog hais txog cov txheej txheem uas ib qho electrolyte dissociated rau hauv ions them uas tuaj yeem txav mus los ntawm cov kuab tshuaj tshwj xeeb (xws li dej, cawv). Piv txwv li, sodium chloride (NaCl), ntsev uas peb noj txhua hnub, yaj hauv dej thiab ionizes los tsim cov sodium ions (Na +) uas muaj txiaj ntsig zoo thiab cov tshuaj chloride ions (Cl) uas tsis zoo. Uas yog hais tias, thaum HPMC muab tso rau hauv dej, nws yuav tsis dissociate rau ions them, tab sis muaj nyob rau hauv daim ntawv ntawm molecules.
Post lub sij hawm: Apr-26-2023